Today in Earthquake History

Today's Earthquake Fact:
The term seismic seiche was first coined by Anders Kvale in 1955, to describe oscillation of lake levels in Norway and England caused by the Assam earthquake of August, 1950.

Year at a Glance

April

Note: All earthquake dates are UTC, not local time.

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Year	Location	Magnitude	Comment

1952	El Reno, Oklahoma	5.5	The largest historical earthquake in Oklahoma. This earthquake caused moderate damage at El Reno, Oklahoma City, and Ponca City, including toppled chimneys and smokestacks, cracked and loosened bricks on buildings, and broken windows and dishes. One crack in the State Capitol at Oklahoma City was 15 meters long.

1976	Ecuador	6.7	Eight killed, 46 injured in Esmeraldas area. From Significant Earthquakes of the World 1976.

1985	Near Coast of Central Chile	7.5	One person died from a heart attack, several people injured and some damage (VI) in the Santiago- Valparaiso area. One additional person died from a heart attack at Chillan. Felt throughout much of central Chile from La Serena to Osorno. Felt (IV) at Mendoza, Argentina. Also felt in San Juan, San Luis, Cordoba, Tucuman and Santa Fe Provinces, Argentina. From Significant Earthquakes of the World, 1985.

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